I've been using Kunifer brake line here for more years than I care to remember.
In fact my truck is the first vehicle i've ever owned that actually used steel.
I used a 'universal' steel brake line kit sourced from TCI in the USA for simplicity,it came with all the brass fittings,brake light switch and aluminium chassis clips.

I actually ran out of steel line and used Cu for the rest and have had no corrosion issues in any form despite the fact the truck is driven in all weathers including salted winter roads.




1950 Chevy Advance Design 3100 in Scotland
In the Stovebolt Gallery
More pix on Flickr.
I've definately got this truck thing in my blood ... my DNA sequence has torque settings
"Of all the small nations of this earth,perhaps only the ancient Greeks surpass the Scots in their contribution to mankind" Winston Churchill.